lithium-ion

Donut Lab’s −30 °C Battery Claim Meets a +38 °C Self-Heating Reality

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Donut Lab’s −30 °C Battery Claim Meets a +38 °C Self-Heating Reality

Donut Lab, the Finnish company behind the CES-January solid-state battery billed as first for production vehicles, published a VTT report on 21 October on a −30 °C test. The headline: 93% energy retention. The figure is real; the document — confidential per VTT, released by Donut Lab — is complete, signed and legible. Page 10: … Read more

Smartphone Battery Care: What Actually Slows Lithium-Ion Degradation

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Smartphone Battery Care: What Actually Slows Lithium-Ion Degradation

Every smartphone battery sheds capacity over time, and no toggle reverses that. What a setting can change is the speed of the slide. Apple, Google and Samsung now ship charge ceilings and adaptive routines built specifically to keep lithium-ion cells away from the two states that hurt them most: sitting at full charge and running … Read more